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SSM第三季-SpringMVC-Controller方法返回值&SSM整合案例&配置异常处理器

2020/8/11 19:13:29 文章标签:

SpringMVC

SpringMVC简要处理流程

在这里插入图片描述

Controller方法返回值

① ModelAndView

②void:使用原生的request,response

③String:

​ Ⅰ 返回视图名 viewName推荐使用

​ Ⅱ返回forward

​ Ⅲ 重定向redirect

④ 自定义类型-需要@ResponseBody注解

package com.sikiedu.controller;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import com.sikiedu.bean.ItemInfo;
/**
 * 商品管理 游戏管理
 * @author AzurLane
 *Controller方法返回值
 */
@Controller
//简化路径  /item/xxx.do
@RequestMapping(value="/item/")
public class ItemController {
	
	//ModelAndView 返回模型和视图
	//多请求路径, 设置请求方法(不写的话,默认全部方法都支持)
	@RequestMapping(value= {"list.do","mylist.do"},method= {RequestMethod.GET,RequestMethod.POST})
	public ModelAndView list() {
		ModelAndView mav = new ModelAndView();
		//传递数据
		ItemInfo info1 = new ItemInfo("1","碧蓝航线","休闲","0");
		ItemInfo info2 = new ItemInfo("2","魔兽世界","RPG","0");
		ItemInfo info3 = new ItemInfo("3","绝地求生","射击","90");
		ItemInfo info4 = new ItemInfo("4","英雄联盟","MOBA","0");
		
		List<ItemInfo> itemList = new ArrayList<ItemInfo>();
		itemList.add(info1);
		itemList.add(info2);
		itemList.add(info3);
		itemList.add(info4);
		//将游戏列表返回给前台
		mav.addObject("itemList",itemList);
		
		mav.setViewName("/WEB-INF/jsp/item_list.jsp");
		return mav;
	}
	
	//void 使用原生的request和response
	@RequestMapping(value="")
	public void voidTest(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {
		//获取参数
		request.getParameter("");
		
		//转发
		request.getRequestDispatcher("").forward(request, response);
		
		//重定向
		response.sendRedirect(request.getContextPath() + "/xx.jsp");
	}
	
	//String 转发
	@RequestMapping("forwardString.do")
	public String forwardString() {
		return "forward:mylist.do";
	}
	
	//String 重定向
	@RequestMapping("redirectString.do")
	public String redirectString() {
		return "redirect:/form.jsp";
	}
	
	//String 返回视图名 viewName  推荐使用
	@RequestMapping("testList.do")
	public String testList(Model model) {
		//传递数据
		ItemInfo info1 = new ItemInfo("1","碧蓝航线","休闲","0");
		ItemInfo info2 = new ItemInfo("2","魔兽世界","RPG","0");
		ItemInfo info3 = new ItemInfo("3","绝地求生","射击","90");
		ItemInfo info4 = new ItemInfo("4","英雄联盟","MOBA","0");
		
		List<ItemInfo> itemList = new ArrayList<ItemInfo>();
		itemList.add(info1);
		itemList.add(info2);
		itemList.add(info3);
		itemList.add(info4);
		//将游戏列表返回给前台
		model.addAttribute("itemList",itemList);
		
		return "/WEB-INF/jsp/item_list.jsp";
	}
}

SpringMVC&Spring&MyBatis整合

整合ssm 3大框架

a) 导包 -> spring_Jar整理 -> ssm框架整合包

c3p0-0.9.5.5.jar

com.springsource.org.aopalliance-1.0.0.jar
com.springsource.org.apache.commons.logging-1.1.1.jar
com.springsource.org.aspectj.weaver-1.6.8.RELEASE.jar
jstl-1.2.jar
mchange-commons-java-0.2.19.jar
mybatis-3.4.6.jar
mybatis-spring-1.3.2.jar
mysql-connector-java-8.0.16.jar
spring-aop-5.0.8.RELEASE.jar
spring-aspects-5.0.8.RELEASE.jar
spring-beans-5.0.8.RELEASE.jar
spring-context-5.0.8.RELEASE.jar
spring-core-5.0.8.RELEASE.jar
spring-expression-5.0.8.RELEASE.jar
spring-jdbc-5.0.8.RELEASE.jar
spring-tx-5.0.8.RELEASE.jar
spring-web-5.0.8.RELEASE.jar
spring-webmvc-5.0.8.RELEASE.jar
standard.jar

jackson-annotations-2.9.6.jar
jackson-core-2.9.6.jar
jackson-databind-2.9.6.jar

b) 配置 -> web.xml

​ i. 读取spring配置文件;

​ ii. 配置springmvc前端控制器;

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>ssm_project_springmvc</display-name>
  <!-- 过滤器  解决表单post提交乱码问题 -->
  <filter>
  	<filter-name>encoding</filter-name>
  	<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
  	<init-param>
  		<param-name>encoding</param-name>
  		<param-value>utf-8</param-value>
  	</init-param>
  </filter>
  <filter-mapping>
  	<filter-name>encoding</filter-name>
  	<!-- 拦截全部 /* -->
  	<url-pattern>*.do</url-pattern>
  </filter-mapping>
  
  <servlet>
  	<servlet-name>springmvc</servlet-name>
  	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  	<init-param>
  		<!-- 读取配置文件 -->
  		<param-name>contextConfigLocation</param-name>
  		<param-value>classpath:applicationContext.xml</param-value>
  	</init-param>
  </servlet>
  
  <servlet-mapping>
  	<servlet-name>springmvc</servlet-name>
  	
  	<!-- 拦截规则 -->
  	<!-- 
  		1 *.html *.do *.action   以扩展名方式进行拦截,不拦截静态资源  .jpg .css .js .png   什么情况下都可以使用
  		2 / 不拦截 jsp 拦截静态资源 .jpg .css .js .png  														RESTful 风格 静态资源放行  稍后会讲到
  		
  		/* 全都拦截 包括jsp 以及所有静态资源      不推荐使用的
  	 -->
  	
  	<url-pattern>*.do</url-pattern>
  </servlet-mapping>
</web-app>

c) 配置 -> applicationContext.xml

​ i. 读取数据库配置文件;

​ ii. 配置数据源连接池;

​ iii. 开启注解扫描;

​ iv. 配置事务核心管理器;

​ v. 开启注解事务;

​ vi. 配置视图解析器;

​ vii. 配置Mybatis:

​ \1. 配置sqlSessionFactory;

​ \2. 配置别名;

​ \3. 配置mapper工厂;

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

		<!-- 读取配置文件 数据库 -->
		<context:property-placeholder location="classpath:db.properties"/>
		
		<!-- 配置数据源 -->
		<bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
			<property name="driverClass" value="${jdbc.driverClass}"/>
			<property name="jdbcUrl" value="${jdbc.jdbcUrl}"/>
			<property name="user" value="${jdbc.user}"/>
			<property name="password" value="${jdbc.password}"/>
		</bean>
	
		<!-- 开启注解扫描 -->
		<context:component-scan base-package="com.sikiedu"></context:component-scan>
	
		<!-- 开启注解驱动 -->
		<mvc:annotation-driven/>

		<!-- 事务核心管理器 -->
		<bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
			<property name="dataSource" ref="dataSource"/>
		</bean>
		
		<!-- 开启注解事务 -->		
		<tx:annotation-driven/>
		
		<!-- 配置视图解析器 -->
		<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
			<property name="prefix" value="/WEB-INF/jsp/"/>
			<property name="suffix" value=".jsp"/>
		</bean>
		
		<!-- 配置mybatis -->
		<bean name="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
			<property name="dataSource" ref="dataSource"/>
			<property name="typeAliasesPackage" value="com.sikiedu.bean"/>
		</bean>
		
		<!-- mapper工厂 -->
		<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
			<property name="basePackage" value="com.sikiedu.mapper"/>
		</bean>
	
</beans>

SpringMVC参数绑定与数据交互

bean层

ItemInfo.java
package com.sikiedu.bean;
/**
 * 游戏信息
 * @author AzurLane
 *
 */
public class ItemInfo {
	private String item_id;
	private String item_name;
	private String item_type;
	private Double item_price;
	/*get和set方法*/
	
}
ItemInfoVo.java
package com.sikiedu.bean;

import java.util.List;

/**
 * 包装类 ItemInfoVo
 * @author AzurLane
 *
 */
public class ItemInfoVo {
	private ItemInfo itemInfo;

	private String[] ids;
	
	private List<Double> priceList;
	/*get和set方法*/
}

mapper层

ItemMapper.接口
package com.sikiedu.mapper;

import java.util.List;

import com.sikiedu.bean.ItemInfo;
import com.sikiedu.bean.ItemInfoVo;

/**
 * 
 * @author AzurLane
 *
 */
public interface ItemMapper {
	//查询全部
	public List<ItemInfo> selectAll();

	//根据id查询
	public ItemInfo selectItemInfoById(String id);

	public void deleteById(String id);
	//保存
	public void save(ItemInfo item);

	//根据vo查询 返回列表
	public List<ItemInfo> selectByVo(ItemInfoVo vo);
}
ItemMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
  PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
  <mapper namespace="com.sikiedu.mapper.ItemMapper">
  	
  	
  	<select id="selectAll" resultType="ItemInfo">
  		SELECT * FROM item_info
  	</select>
  
  	<!-- //根据id 查询ItemInfo
	public ItemInfo selectItemInfoById(String id); -->
	<select id="selectItemInfoById" parameterType="String" resultType="ItemInfo">
		SELECT * FROM item_info WHERE item_id = #{id}
	</select>
	
	<!-- //根据id删除
	public void deleteById(String id); -->
	<delete id="deleteById" parameterType="String">
		DELETE FROM item_info WHERE item_id = #{id}
	</delete>
  
  	<!-- 	//保存
	public void save(ItemInfo item); -->
	<insert id="save" parameterType="ItemInfo">
		INSERT INTO item_info VALUES(
			#{item_id},
			#{item_name},
			#{item_type},
			#{item_price}
		)
	</insert>
	
	<!-- 	//根据vo 查询 返回列表
	public List<ItemInfo> selectByVo(ItemInfoVo vo); -->
	<select id="selectByVo" parameterType="ItemInfoVo" resultType="ItemInfo">
		SELECT * FROM item_info
		<where>
			<!-- 多条件查询 -->
			<if test="itemInfo.item_id != null and itemInfo.item_id != ''">
				item_id = #{itemInfo.item_id}
			</if>
			
			<if test="itemInfo.item_name != null and itemInfo.item_name != ''">
				and item_name LIKE "%"#{itemInfo.item_name}"%"
			</if>
			
			<if test="itemInfo.item_type != null and itemInfo.item_type != ''">
				and item_type = #{itemInfo.item_type}
			</if>
			
			<if test="itemInfo.item_price != null and itemInfo.item_price != ''">
				and item_price = #{itemInfo.item_price}
			</if>
		</where>
	</select>
  
  </mapper>

service层

ItemService.java接口
package com.sikiedu.service;

import java.util.List;

import com.sikiedu.bean.ItemInfo;
import com.sikiedu.bean.ItemInfoVo;

public interface ItemService {
	//查询全部
	public List<ItemInfo> selectAll();

	public ItemInfo selectItemInfoById(String id);
	
	//根据id删除
	public void deleteById(String id);
	
	//保存
	public void save(ItemInfo item);

	//根据vo查询返回列表
	public List<ItemInfo> selectByVo(ItemInfoVo vo);
}

ItemServiceImpl.java
package com.sikiedu.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.sikiedu.bean.ItemInfo;
import com.sikiedu.bean.ItemInfoVo;
import com.sikiedu.mapper.ItemMapper;

@Service
public class ItemServiceImpl implements ItemService{

	@Autowired
	private ItemMapper itemMapper;
	
	
	@Override
	public List<ItemInfo> selectAll() {
		return itemMapper.selectAll();
	}


	@Override
	public ItemInfo selectItemInfoById(String id) {
		return itemMapper.selectItemInfoById(id);
	}


	@Override
	public void deleteById(String id) {
		itemMapper.deleteById(id);
	}


	@Override
	public void save(ItemInfo item) {
		itemMapper.save(item);
	}

	//通过包装类查询
	@Override
	public List<ItemInfo> selectByVo(ItemInfoVo vo) {
		return itemMapper.selectByVo(vo);
	}
	
}

controller层

ItemController.java

参数绑定-默认参数&基本类型&bean对象&包装类&数组&List

package com.sikiedu.controller;

import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import com.sikiedu.bean.ItemInfo;
import com.sikiedu.bean.ItemInfoVo;
import com.sikiedu.service.ItemService;

/**
 * 游戏信息管理
 * 
 * @author AzurLane
 *
 */
@Controller
@RequestMapping("/item/")
public class ItemController {
	@Autowired
	private ItemService itemService;
	
    //主页面
	@RequestMapping("allList.do")
	public ModelAndView list() {
		ModelAndView mav = new ModelAndView();

		List<ItemInfo> itemList = itemService.selectAll();
		// 查询 将结果赋值给mav
		mav.addObject("itemList", itemList);
		// 设置视图名
		mav.setViewName("item_list");

		return mav;
	}
	
	@RequestMapping("select.do")
	public String select(HttpServletRequest request, HttpServletResponse response, HttpSession session, Model model) {
		String id = request.getParameter("id");
		ItemInfo item = itemService.selectItemInfoById(id);

		List<ItemInfo> itemList = new ArrayList<ItemInfo>();
		itemList.add(item);

		// model
		model.addAttribute("itemList", itemList);
		// 返回视图名称 保存数据
		return "item_list";
	}

	// 基本类型参数绑定
	@RequestMapping("delete.do")
	// 此处的id要与前台传递的id名字相同 如果不相同需要使用
	// public String delete(@RequestParam(value="id",required=false,
	// defaultValue="1")String deleteId)
	public String delete(String id) {
		// 从前台获取id
		System.out.println("delete id = " + id);
		// 删除
		itemService.deleteById(id);

		// 重定向到列表页
		return "redirect:allList.do";
	}

	// 绑定bean对象的形式 来完成参数的获取
	@RequestMapping("save.do")
	public String save(ItemInfo item) {
		// 获取参数
		System.out.println(item);
		// 保存逻辑
		itemService.save(item);
		// 重定向到列表页
		return "redirect:allList.do";
	}

	// 包装类绑定
	@RequestMapping("selectByVo.do")
	public String selectByVo(ItemInfoVo vo, Model model) {

		// 获取vo对象
		System.out.println("itemInfoVo" + vo.getItemInfo());
		// 查询
		List<ItemInfo> itemList = itemService.selectByVo(vo);
		// 保存数据
		model.addAttribute("itemList", itemList);
		// 返回视图名称
		return "item_list";

	}

	// 绑定数组
	@RequestMapping("selectArrays.do")
	public void selectArrays(String[] ids) {
		System.out.println("ids= " + ids.length);

		for (String string : ids) {
			System.out.println("id=" + string);
		}
	}

	// 绑定Vo数组
	@RequestMapping("selectVoArrays.do")
	public void selectVoArrays(ItemInfoVo vo) {
		System.out.println("ids=" + vo.getIds().length);

		for (String string : vo.getIds()) {
			System.out.println("id=" + string);
		}
	}

	// 绑定VoList集合
	@RequestMapping("selectVoList.do")
	public void selectVoList(ItemInfoVo vo) {
		System.out.println("list=" + vo.getPriceList().size());

		Double totalPrice = 0d;
		for (Double price : vo.getPriceList()) {
			System.out.println("price=" + price);
			totalPrice += price;
		}
		System.out.println("总价=" + totalPrice);
	}

	// 接受前台的json字符串
	// 使用@RequestBody注解可以将前台发送的json格式字符串转换为ItemInfo对象
	// 使用@ResponseBody可以将ItemInfo对象转换为json格式字符串返回给前台
	@RequestMapping("jsonData.do")
	@ResponseBody
	public ItemInfo jsonData(@RequestBody ItemInfo item) {
		System.out.println("json Data = " + item);
		return item;
	}

	// 回显数据
	@RequestMapping("editItem.do")
	@ResponseBody
	public ItemInfo editItem(String id) {
		// 根据id查询游戏信息
		ItemInfo item = itemService.selectItemInfoById(id);
		return item;
	}

	// 获取所有的游戏名称
	// 使用@RequestBody来绑定list
//	@RequestMapping("getNameList.do")
//	public void getNameList(@RequestBody List<String> nameList) {
//		System.out.println("nameList size" + nameList.size());
//
//		for (String string : nameList) {
//			System.out.println(string);
//		}
//	}

	//使用@RequestBody来接受前台发送的集合类型
	// 使用@RequestBody来绑定array数组
	@RequestMapping("getNameList.do")
	public void getNameList(@RequestBody String[] array) {
		System.out.println("nameList size" + array.length);

		for (String string : array) {
			System.out.println("array name=" +string);
		}
	}
}

前台页面

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
		<meta charset="UTF-8">
		<title>游戏管理后台</title>
        <meta name="viewport" content="initial-scale=1.0,maximum-scale=1.0,user-scalable=no">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
  		 <!-- bootstrap framework -->
		<link href="${pageContext.request.contextPath }/css/bootstrap.min.css" rel="stylesheet" media="screen">
		<!-- main stylesheet -->
		<link href="${pageContext.request.contextPath }/css/main.min.css" rel="stylesheet" media="screen" id="mainCss">
		<!-- elegant icons -->
        <link href="${pageContext.request.contextPath }/css/style.css" rel="stylesheet" media="screen">
        <!-- datepicker -->
        <link href="${pageContext.request.contextPath }/css/datepicker3.css" rel="stylesheet" media="screen">
        <!-- jBox -->
        <link href="${pageContext.request.contextPath }/css/jbox.css" rel="stylesheet" media="screen">
        <link href="${pageContext.request.contextPath }/css/noticeborder.css" rel="stylesheet" media="screen">

    </head>
    <body class="side_menu_active side_menu_expanded">
        <div id="page_wrapper">

            <!-- header -->
            <header id="main_header">
                <div class="container-fluid">
                	<!--logo-->
                    <div class="brand_section">
                        <a href="#"><img src="${pageContext.request.contextPath }/picture/logo01.png" alt="site_logo" width="108" height="40" style="margin-top: 5px"></a>
                    </div>
                    <div class="header_user_actions dropdown">
                        <div data-toggle="dropdown" class="dropdown-toggle user_dropdown">
                            <div class="user_avatar">
                                <img src="${pageContext.request.contextPath }/picture/head01.png" width="38" height="38">
                            </div>
                            <span class="caret"></span>
                        </div>
                        <ul class="dropdown-menu dropdown-menu-right">
                            <li><a href="#">个人中心</a></li>
                            <li><a href="#">注销</a></li>
                        </ul>
                    </div>
                </div>
            </header>

            <!-- main content -->
            <div id="main_wrapper">
                <div class="container-fluid">
                    <div class="row">
                        <div class="col-md-12">
                        	<form action="${pageContext.request.contextPath }/item/selectByVo.do" method="post">
                        		<input type="text" placeholder="id"  name="itemInfo.item_id"/>
                        		<input type="text" placeholder="名称" name="itemInfo.item_name"/>
								<input type="text" placeholder="类型" name="itemInfo.item_type"/>
								<input type="text" placeholder="原价" name="itemInfo.item_price"/>
                        		<input type="submit" value="查询"/>
                        	</form>
                            <div class="row">
                                <div class="col-md-10">
                                	<!--  <form action="${pageContext.request.contextPath }/item/selectArrays.do" method="post"> -->
                                	<!--<form action="${pageContext.request.contextPath }/item/selectVoArrays.do" method="post">-->
                                    <form action="${pageContext.request.contextPath }/item/selectVoList.do" method="post">
                                    <table class="table table-yuk2 toggle-arrow-tiny" id="footable_demo" data-filter="#textFilter" data-page-size="5">
                                        <thead>
                                            <tr>
                                            	<!--描述:商品数据标签-->
                                                <th>ID</th>
                                                <th>游戏名称</th>
                                                <th>类型</th>
                                                <th>原价</th>
                                            </tr>
                                        </thead>
                                        <tbody>
                                       		<c:forEach items="${itemList }" var="item" varStatus="i">
	                                        	<tr>
	                                        		<td><input type="checkbox" name="ids" value="${item.item_id }" /></td>
	                                                <td>${item.item_id }</td>
	                                                <td><input type="text" class="input_item_name" value="${item.item_name }"></td>
	                                                <td>${item.item_type }</td>
	                                                <td><input type="text" name="priceList[${i.index}]" value="${item.item_price }"></td>
	                                                <!-- <td>${item.item_price }</td> -->
	                                                <td data-value="1">
	                                                	<a herf="#" id="edit_btn" class="btn btn-xs btn-info" data-toggle="modal" data-target="#editLayer" οnclick="editItem('${item.item_id}')">修改</a>
	                                                	<a herf="#"  id="del_btn" class="btn btn-xs btn-danger" οnclick="deleteItem('${item.item_id}')">删除</a>
	                                                </td>
	                                           	</tr>
                                        	</c:forEach>
                                        </tbody>
                                        <tfoot class="hide-if-no-paging">
                                            <tr>
                                                <td colspan="5">
                                                    <ul class="pagination pagination-sm"></ul>
                                                </td>
                                            </tr>
                                        </tfoot>
                                    </table>
                                    <input type="submit" value="获取id数组">
                                    <input type="submit" value="获取总价">
                                    <input type="button" value="ajax提交json数据" οnclick="jsonData()">
                                    <input type="button" value="获取所有name" οnclick="getNameList()">
                                    </form>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            
            <!-- edit layer -->
            <div class="modal fade" id="editLayer">
                <div class="modal-dialog modal-content">
                    <div class="modal-content">
                        <div class="modal-header">
                            <button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button>
                            <h4 class="modal-title">修改游戏信息</h4>
                        </div>
                   	<div class="modal-body">
                        <!--游戏修改详情弹出层表单-->
	                    <form class="form-horizontal" id="edit_item_form">
	                    	<!-- 游戏id隐藏域 -->
							<input type="hidden" id="edit_item_id" name="item_id"/>
							<!-- 游戏名称 -->
							<div class="form-group">
								<label for="edit_item_name" class="col-sm-2 control-label">游戏名称</label>
								<div class="col-sm-10">
									<input type="text" class="form-control" id="edit_item_name" placeholder="游戏名称" name="item_name">
								</div>
							</div>
							<!-- 游戏类型 -->
							<div class="form-group">
								<label for="edit_item_type" class="col-sm-2 control-label">类型</label>
								<div class="col-sm-10">
									<input type="text" class="form-control" id="edit_item_type" placeholder="类型" name="item_type">
								</div>
							</div>
							<!-- 游戏原价 -->
							<div class="form-group">
								<label for="edit_item_price" class="col-sm-2 control-label">原价</label>
								<div class="col-sm-10">
									<input type="text" class="form-control" id="edit_item_price" placeholder="原价" name="item_price">
								</div>
							</div>
						</form>  
                    </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-default btn-sm" data-dismiss="modal">取消</button>
                            <button type="button" class="btn btn-primary btn-sm" οnclick="updateItem()">确认修改</button>
                        </div>
                    </div>
                </div>
            </div>
            
             <!-- add layer -->
            <div class="modal fade" id="addLayer">
                <div class="modal-dialog modal-content">
                    <div class="modal-content">
                        <div class="modal-header">
                            <button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button>
                            <h4 class="modal-title">新增游戏</h4>
                        </div>
                   	<div class="modal-body">
                        <!--添加游戏弹出层表单-->
	                    <form class="form-horizontal" id="add_item_form">
	                    	<!-- 游戏id -->
							<div class="form-group">
								<label for="add_item_id" class="col-sm-2 control-label">游戏id</label>
								<div class="col-sm-10">
									<input type="text" class="form-control" id="add_item_id" placeholder="游戏id" name="item_id">
								</div>
							</div>
							<!-- 游戏名称 -->
							<div class="form-group">
								<label for="add_item_name" class="col-sm-2 control-label">游戏名称</label>
								<div class="col-sm-10">
									<input type="text" class="form-control" id="add_item_name" placeholder="游戏名称" name="item_name">
								</div>
							</div>
							<!-- 游戏类型 -->
							<div class="form-group">
								<label for="add_item_type" class="col-sm-2 control-label">类型</label>
								<div class="col-sm-10">
								 	<input type="text" class="form-control" id="add_item_type" placeholder="类型" name="item_type">
								</div>
							</div>
							<!-- 游戏原价 -->
							<div class="form-group">
								<label for="add_item_price" class="col-sm-2 control-label">原价</label>
								<div class="col-sm-10">
									<input type="text" class="form-control" id="add_item_price" placeholder="原价" name="item_price">
								</div>
							</div>
						</form>  
                    </div>
                        <div class="modal-footer">
                            <button type="button" class="btn btn-default btn-sm" data-dismiss="modal">取消</button>
                            <button type="button" class="btn btn-primary btn-sm" οnclick="addItem()">确认添加</button>
                        </div>
                    </div>
                </div>
            </div>

            
            <!-- main menu -->
            <nav id="main_menu">
                <div class="menu_wrapper">
                    <ul>
                        <li class="first_level">
                            <a href="javascript:void(0)">
                                <span class="icon_document_alt first_level_icon"></span>
                                <span class="menu-title">游戏管理</span>
                            </a>
                            <ul>
                                <li class="submenu-title">游戏管理</li>
                                <li><a href="#" data-toggle="modal" data-target="#addLayer">商品添加</a></li>
                                <li><a href="${pageContext.request.contextPath }/item/myitemlist.do">游戏列表</a></li>
                            </ul>
                        </li>
                    </ul>
                </div>
                <div class="menu_toggle">
                    <span class="icon_menu_toggle">
                        <i class="arrow_carrot-2left toggle_left"></i>
                        <i class="arrow_carrot-2right toggle_right" style="display:none"></i>
                    </span>
                </div>
            </nav>
        </div>

        <!-- jQuery -->
        <script src="${pageContext.request.contextPath }/js/jquery.min.js"></script>
        <!-- jQuery Cookie -->
        <script src="${pageContext.request.contextPath }/js/jquerycookie.min.js"></script>
        <!-- Bootstrap Framework -->
        <script src="${pageContext.request.contextPath }/js/bootstrap.min.js"></script>
        <!-- retina images -->
        <script src="${pageContext.request.contextPath }/js/retina.min.js"></script>
        <!-- switchery -->
        <script src="${pageContext.request.contextPath }/js/switchery.min.js"></script>
        <!-- typeahead -->
        <script src="${pageContext.request.contextPath }/js/typeahead.bundle.min.js"></script>
        <!-- fastclick -->
        <script src="${pageContext.request.contextPath }/js/fastclick.min.js"></script>
        <!-- match height -->
        <script src="${pageContext.request.contextPath }/js/jquery.matchheight-min.js"></script>
        <!-- scrollbar -->
        <script src="${pageContext.request.contextPath }/js/jquery.mcustomscrollbar.concat.min.js"></script>
		<!-- moment.js (date library) -->
        <script src="${pageContext.request.contextPath }/js/moment-with-langs.min.js"></script>
        <!-- Yukon Admin functions -->
        <script src="${pageContext.request.contextPath }/js/yukon_all.min.js"></script>
	    <!-- page specific plugins -->
        <!-- footable -->
        <script src="${pageContext.request.contextPath }/js/footable.min.js"></script>
        <script src="${pageContext.request.contextPath }/js/footable.paginate.min.js"></script>
        <script src="${pageContext.request.contextPath }/js/footable.filter.min.js"></script>
       	<!-- datepicker -->
        <script src="${pageContext.request.contextPath }/js/bootstrap-datepicker.js"></script>
   		<!-- jBox -->
        <script src="${pageContext.request.contextPath }/js/jbox.min.js"></script>
        
        <script type="text/javascript">
	        $(function() {
	            //footable
	            yukon_footable.goodslist();
	            //datepicker
	            yukon_datepicker.p_forms_extended();
	        })
	        
	        //修改弹框回显
	       	function toEdit(id) {
	   			$.ajax({
	   				type:"post",
	   				url:"${pageContext.request.contextPath }/item/toEdit",
	   				data:{"id":id},
	   				success:function(data) {
	   					$("#edit_item_name").val(data.item_name);
	   					$("#edit_item_type").val(data.item_type);
	   					$("#edit_item_price").val(data.item_price);
	   				},
	   				dataType:"json"
	   			});
	   		}
	        //确认修改
			function updateItem() {
				$.post(
					"${pageContext.request.contextPath }/item/update.do",
					$("#edit_item_form").serialize(),
					function(data){
						alert("游戏信息更新成功!");
						window.location.reload();
				});
			}
			
	        //确认删除
			function deleteItem(id) {
				if(confirm('确实要删除该游戏吗?')) {
					$.post(
						"${pageContext.request.contextPath }/item/delete.do",
						{"id":id},
						function(data){
							window.location.reload();
					});
				}
			}
			
	        //添加游戏
			function addItem() {
				$.post(
					"${pageContext.request.contextPath }/item/save.do",
					$("#add_item_form").serialize(),
					function(data){
						alert("游戏添加成功!");
						window.location.reload();
				});
			}
	        
	        
	        function getNameList() {
				//获取所有name值
				//保存所有name值
				var nameList = new Array();
				$(".input_item_name").each(function() {
					nameList.push($(this).val());
				});
				
				//发送到后台
				$.ajax({
					type:"post",
					url:"${pageContext.request.contextPath}/item/getNameList.do",
					contentType:"application/json;charset=utf-8",
					data:JSON.stringify(nameList)
					
				});
	        }
	        
	        //修改弹性回显
	        function editItem(id) {
				$.ajax({
					type:"post",
					url:"${pageContext.request.contextPath}/item/editItem.do",
					data:{"id":id},
					dataType:"json",
					success:function(data){
						//alert(data.item_type)
						$('#edit_item_name').val(data.item_name);
						$('#edit_item_type').val(data.item_type);
						$('#edit_item_price').val(data.item_price);
					}
				});
			}
	        
	        //使用ajax发送和接受json格式的字符串
	        function jsonData() {
	        	//json格式的字符串  要传输的数据
	        	var jsondata = '{"item_id":"99","item_name":"超级玛丽","item_type":"横版过关","item_price":25}';
				
	        	$.ajax({
	        		type:"post",
	        		url:"${pageContext.request.contextPath}/item/jsonData.do",
	        		//发送的数据格式
	        		contextType:"application/json;charset=utf-8",
	        		//回调的格式
	        		dataType:"json",
	        		data:jsondata,
	        		success:function(data){
	        			alert(data.item_name);
	        		}
	        	});
			}
		</script>
    </body>
</html>

页面效果

在这里插入图片描述

异常处理器

在这里插入图片描述

捕获自定义异常和运行时异常

在applicationContext.xml中配置异常处理器

<!-- 配置异常处理器 -->
<bean class="com.sikiedu.exception.MyHandlerExceptionResolver"/> 

exception包

MyHandlerExceptionResolver.java
package com.sikiedu.exception;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;

/**
 * 自定义异常处理器实现
 */
public class MyHandlerExceptionResolver implements HandlerExceptionResolver {

	@Override
	public ModelAndView resolveException(
			HttpServletRequest request, 
			HttpServletResponse response, 
			Object obj,	//obj 异常对象的 全包名 + 类名+ 方法名
			Exception e) {
		
		ModelAndView mav = new ModelAndView();
		
		//获取异常信息
		String errorMsg = "";
		
		//判断异常信息类型
		if(e instanceof MyException) {
			//执行自定义异常处理
			errorMsg = "自定异常 " + ((MyException)e).getMsg() +"  " + obj;
		}else {
			//运行时异常
			errorMsg = "运行时异常 " + e.getMessage() +"  " + obj;
		}
		
		//将异常信息输出到错误页面
		mav.addObject("error", errorMsg);
		
		//设置要跳转的视图名称
		mav.setViewName("error");
		
		return mav;
	}

}
MyException.java
package com.sikiedu.exception;

/**
 * 自定义 异常类
 * 
 * @author 
 */
public class MyException extends Exception {
	//错误消息
	private String msg;
	public String getMsg() {
		return msg;
	}
	public void setMsg(String msg) {
		this.msg = msg;
	}
	public MyException(String msg) {
		super();
		this.msg = msg;
    }
}

在service层中添加自定义异常和运行时异常

ItemServiceImpl.java

@Override
	public List<ItemInfo> selectAll() throws MyException {
		//制造运行时异常
		int i = 1/0;
        
		//制造自定义异常
		if(true) {
			throw new MyException("列表没有获取到");
		}
		
		return itemMapper.selectAll();
	}

在Controller层的方法中抛出自定义异常

@RequestMapping("allList.do")
	public ModelAndView list() throws MyException {
		ModelAndView mav = new ModelAndView();

		List<ItemInfo> itemList = itemService.selectAll();
		// 查询 将结果赋值给mav
		mav.addObject("itemList", itemList);
		// 设置视图名
		mav.setViewName("item_list");

		return mav;
	}

在WEB-INF/jsp文件夹下添加error.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	<h1>${error }</h1>
</body>
</html>

使用注解式配置异常处理器

使用注解式不需要在applicationContext.xml中配置异常处理器

MyGlobalExceptionHandler.java

package com.sikiedu.exception;

import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * 自定义全局异常处理类
 * 
 */
@ControllerAdvice
public class MyGlobalExceptionHandler {
	
	//处理运行时异常
	@ExceptionHandler(RuntimeException.class)
	@ResponseBody
	String runtimeHandler(RuntimeException e) {
		return e.getMessage();
	}
	
	//处理自定义异常
	@ExceptionHandler(MyException.class)
	String myHandler(MyException e, Model model) {
		
		model.addAttribute("error", e.getMsg() + "  " + e.getStackTrace()[0]);
		
		//视图名
		return "error";
		
	}
	
}


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